Hairy Vetch, is a vining, winteractive legume. It may be annual or biennial. It has a shallow root system. Stems may grow 2 to 5 feet long. Leaves bearing several leaflets grow perpendicular to the stem and may terminate in tendrils. Stems and leaves of hairy vetch are pubescent (covered with a soft woolly fuzz) and tufts are present at the tips of stems. Flowers are purple. Seeds are round and black and develop inside elongated and flattened pods. Hairy vetch is planted in the fall wherever it is grown. It is normally seeded at 20 to 40 pounds per acre. – By USDA.